18971720

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{7079}}^1$

素因数の和:7157

約数の個数: 32

約数和(自身を含む): 43329600

約数和(自身を除く): 24357880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 134, 268, 335, 536, 670, 1340, 2680, 7079, 14158, 28316, 35395, 56632, 70790, 141580, 283160, 474293, 948586, 1897172, 2371465, 3794344, 4742930, 9485860, 18971720]

約数ペア:

[(1, 18971720), (2, 9485860), (4, 4742930), (5, 3794344), (8, 2371465), (10, 1897172), (20, 948586), (40, 474293), (67, 283160), (134, 141580), (268, 70790), (335, 56632), (536, 35395), (670, 28316), (1340, 14158), (2680, 7079)]